<template>
  <div class="todo-footer" v-show="total">
    <label>
      <!-- <input type="checkbox" :checked="isAll" @change="handleCheckAll"/> -->
      <input type="checkbox" v-model="checkHandel"/>
    </label>
    <span>
      <span>已完成{{ doneTotal }}</span> / 全部{{ total }}
    </span>
    <button class="btn btn-danger" @click="clearAllDone">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "MyFooter",
  props: ['todoList', 'checkAll', 'clearAll'],
  computed: {

    total(){
      return this.todoList.length
    },
    doneTotal() {
      // const x = this.todoList.reduce((pre, current) => {
      //   return pre + (current.done ? 1 : 0);
      // },0);
      // console.log(x)
      // return x;


      return this.todoList.reduce((pre, current)=> pre+(current.done?1:0),0)
    },
    isAll(){
        return this.total === this.doneTotal && this.total>0
    },

    checkHandel:{
      get(){
        return this.isAll;
      },
      set(value){
        this.checkAll(value)
      }
    }
  },
  methods:{
    // handleCheckAll(e){
    //     this.checkAll(e.target.checked)
    // }

    clearAllDone(){
        this.clearAll()
    }
  }
};
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
